Designation: D913 − 15 Standard Practice for Evaluating Degree of Traffic Marking Line Wear1 This standard is issued under the fixed designation D913; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision A number in parentheses indicates the year of last reapproval A superscript epsilon (´) indicates an editorial change since the last revision or reapproval Scope Significance and Use 1.1 This practice covers the evaluation of degree of resistance to wear that may occur with traffic markings in road tests (see Practice D713) or in actual service, using photographic standards for comparative evaluation 1.2 This standard does not purport to address all of the safety problems, if any, associated with its use It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use 4.1 This practice is designed to evaluate the resistance to wear of a traffic marking It must be remembered that a high degree of performance of traffic marking applied to a bare road surface may not guarantee similar results when the same traffic marking is applied over old markings Type of Failure 5.1 The failure as described in Section does not presume any specific mechanism, and all areas where the substrate is visible shall be considered a failure Referenced Documents 2.1 ASTM Standards:2 D713 Practice for Conducting Road Service Tests on Fluid Traffic Marking Materials 2.2 ASTM Adjuncts: Glossy Prints of Photographic Reference3 Use of Photographic References 6.1 The photographic references3 that are part of this practice are representative of the degrees of resistance to wear of stripes of traffic markings (Fig 1) 6.1.1 The degree of resistance to wear is likely to vary over any given area It is therefore preferable to use one of the following grading methods: 6.1.1.1 Select an area as representative and base the relative performance of the traffic marking on this area or 6.1.1.2 Grade segments of the traffic marking and average these gradings Terminology 3.1 Definitions of Terms Specific to This Standard: 3.1.1 failure, described by these photographic references, n—that condition manifested in traffic markings by actual detachment of sections of the film from its substrate or erosion of sections of the marking down to the substrate 3.1.1.1 Discussion—The degree of resistance to failure is judged by the amount of substrate that is covered 3.1.2 substrate, n—the roadway surface or previously applied traffic marking over which the traffic marking being tested was applied NOTE 1—The photographic references are representative of stripes of traffic markings The percentage of surface covered is shown on each reference Procedure 7.1 Compare the representative areas of the traffic marking with the photographic references and estimate the percent of intact film This practice is under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and is the direct responsibility of Subcommittee D01.44 on Traffic Coatings Current edition approved Dec 1, 2015 Published December 2015 Originally approved in 1947 Last previous edition approved in 2010 as D913 – 10 DOI: 10.1520/D0913-15 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website Full-size (8 by 10-in (203 by 254-mm)) glossy prints of the photographic reference showing degrees of chipping are available from ASTM International Headquarters Order Adjunct No: ADJD0913 Report 8.1 Report the mean and range of the substrate coverage estimations, if appropriate Keywords 9.1 durability; pavement markings; resistance to wear; traffic markings; traffic paint Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959 United States D913 − 15 Photographic Reference Set B FIG Relative Percent of Substrate Covered ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); 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